megasquirt air temp sensor

Post by **demo2** » Wed Apr 25, 2012 1:47 pm

Just wondering where u ms guys have located the air temp valve on the rover? near the airfilter, near the plenum?
Also does anyone know what thread it is?
cheers

DaveEFI · Post by **DaveEFI** » Wed Apr 25, 2012 3:50 pm

My SDI started out with flapper injection - so I replaced the flapper with a bit of ally tube when I went MS. I fitted the ATS in that.

Post by **Coops** » Wed Apr 25, 2012 7:54 pm

mine lives here Biatch

Post by **demo2** » Wed Apr 25, 2012 10:21 pm

I allready saw that pic sliag, so does any1 know what thread it is?
Im gonna try and do away with the y piece in the intake so it has two hoses straight into the airfilter housing, cant see the point of having 2 pipes squeezing down to one now dont need a/f meter.

DaveEFI · Post by **DaveEFI** » Thu Apr 26, 2012 12:26 pm

demo2 wrote:I allready saw that pic sliag, so does any1 know what thread it is?
Im gonna try and do away with the y piece in the intake so it has two hoses straight into the airfilter housing, cant see the point of having 2 pipes squeezing down to one now dont need a/f meter.

One I bought was M18 x 1.5. Pretty common thread for this sort of thing.

Post by **demo2** » Thu Apr 26, 2012 1:35 pm

cheers Dave

SimpleSimon · Post by **SimpleSimon** » Thu Apr 26, 2012 8:21 pm

The often supplied Megasquirt GM open type sensor is a 3/8" NPT thread, I purchased the weld in ali bungs from the states

the above M18 x 1.5 size is a common WB sensor thread.

DaveEFI · Post by **DaveEFI** » Thu Apr 26, 2012 10:24 pm

The sensor I have came from Ebay and has the same electrical characteristics as GM. And, indeed, the one fitted to the flapper. I've a feeling there are two common thread sizes - the US one obviously imperial.

daxtojeiro · Post by **daxtojeiro** » Fri Apr 27, 2012 11:55 am

Hi,
I would keep it away from external heat sources if possible, as it can alter the tune if it gets heated from the exhausts.

I always recommend the air filter if your in doubt, but thats only for NA applications,

Phil

Post by **demo2** » Fri Apr 27, 2012 12:14 pm

cheers Phil, tats what i was thinking, gotta make a new filter housing 2 take 2 pipes as wanna do away with the y piece on twin plenum, may gain a few extra ponies

Paul

DaveEFI · Post by **DaveEFI** » Fri Apr 27, 2012 1:05 pm

daxtojeiro wrote:Hi,
I would keep it away from external heat sources if possible, as it can alter the tune if it gets heated from the exhausts.

I always recommend the air filter if your in doubt, but thats only for NA applications,

Phil

Interesting, Phil. Are you implying the original Lucas position on the SD1 - ie inside the flapper - was less than ideal? This does get some heat from the exhaust manifold especially when stationary. Might explain a few things...

Would it be better in the air filter on one of these? At the moment mine is in a tube which replaces the flapper, but would be easily re-positioned.

daxtojeiro · Post by **daxtojeiro** » Tue May 01, 2012 8:17 pm

DaveEFI wrote:
daxtojeiro wrote:Hi,
I would keep it away from external heat sources if possible, as it can alter the tune if it gets heated from the exhausts.

I always recommend the air filter if your in doubt, but thats only for NA applications,

Phil
Interesting, Phil. Are you implying the original Lucas position on the SD1 - ie inside the flapper - was less than ideal? This does get some heat from the exhaust manifold especially when stationary. Might explain a few things...

Would it be better in the air filter on one of these? At the moment mine is in a tube which replaces the flapper, but would be easily re-positioned.

Hi
If youve got no issues where it is then leave it alone

You can always compensate for it in the tuning software.

If it is going lean due to heat soak, youll notice this when you sit in traffic for a while or if you turn the car off, then re-start the engine after 5 mins and it goes lean until youve driven for a while. If it does that then move the sensor

Phil